300b lovers

I have been an owner of Don Sachs gear since he began, and he modified all my HK Citation gear before he came out with his own creations.  I bought a Willsenton 300b integrated amp and was smitten with the sound of it, inexpensive as it is.  Don told me that he was designing a 300b amp with the legendary Lynn Olson and lo and behold, I got one of his early pair of pre-production mono-blocks recently, driving Spatial Audio M5 Triode Masters.  

Now with a week on the amp, I am eager to say that these 300b amps are simply sensational, creating a sound that brings the musicians right into my listening room with a palpable presence.  They create the most open vidid presentation to the music -- they are neither warm nor cool, just uncannily true to the source of the music.  They replace his excellent Kootai KT88 which I was dubious about being bettered by anything, but these amps are just outstanding.  Don is nearing production of a successor to his highly regard DS2 preamp, which also will have a  unique circuitry to mate with his 300b monos via XLR connections.  Don explained the sonic benefits of this design and it went over my head, but clearly these designs are well though out.. my ears confirm it. 

I have been an audiophile for nearly 50 years having had a boatload of electronics during that time, but I personally have never heard such a realistic presentation to my music as I am hearing with these 300b monos in my system.  300b tubes lend themselves to realistic music reproduction as my Willsenton 300b integrated amps informed me, but Don's 300b amps are in a entirely different realm.  Of course, 300b amps favor efficient speakers so carefully component matching is paramount.

Don is working out a business arrangement to have his electronics built by an American audio firm so they will soon be more widely available to the public.  Don will be attending the Seattle Audio Show in June in the Spatial Audio room where the speakers will be driven by his 300b monos and his preamp, with digital conversion with the outstanding Lampizator Pacific tube DAC.  I will be there to hear what I expect to be an outstanding sonic presentation.  

To allay any questions about the cost of Don's 300b mono, I do not have an answer. 




I too am a fan of the 45 tube type.  I also like the 2a3.  But, it is not only triode tubes that I like.  I am a big fan of the 349 pentode; I wish this were not so rare a tube.  Other pentodes I like include the 350B, and thankfully not as rare 6L6.  The 300b is not the only contender in the low-power weight class.


The 300b is not the only contender in the low-power weight class.

True and I don’t believe that anyone on this thread is disputing this. However, Don and Lynn have stated the very compelling reasons why their amplifier was built utilizing the 300b tube. Excellent decision and execution it certainly seems. I’m excited to hear from those who’ll listen to it at the audio show very soon.


I visited the Spatial Audio/Don Sachs room this morning and again this afternoon.  This was the first room I visited today and I don't think I heard any rooms I liked better today, including some with systems that cost MANY times more. The friends I am with felt the same way, and we often don't agree on what sounds the best. 

Congrats Lynn and Don for building a killer amp and preamp. Very impressive. 


Thanks for your listening impression feedback. Very encouraging to say the least. I hope that others chime in.


My 4+ hour drive to the hotel ended up being a grueling six-hour battle, but I did finally arrive unscathed. After checking in and transferring our luggage to our room, I kissed my wife farewell and went straight to the Spatial/Don Sachs room.


The amps and preamp are beautiful - and have that distinctive D Sachs look IMHO. [I listened to just four songs before getting into a conversation with Don, markusthenaimnut , and his good friend Bob.] How do I describe the music? The first song was a Jennifer Warnes song <not a top 40 song>, and I didn’t analyze it...I mean I so enjoyed the music and her voice without once thinking about the highs, lows, mids, etc. I just sat and enjoyed the moment. How often can you sit down in front of unfamiliar gear; listen to a song, and just enjoy it without analyzing it? And, yes, the songs that followed were excellent.


Once I’ve had a good night’s sleep, and <hopefully> forget about the 6-vehicle smash up on I-5 near Nisqually, I’ll return to this room first thing tomorrow morning and pester Don or whomever is in charge of the music to play my favorite songs, and listen for an hour or more.